Glass-blank-pressing mechanism.



l. RAU.

GLASS BLANK PRESSING MECHANISM. APPLICATION FILED mmso. 19x4.

v Patented Nov. 9, 1915.

I A: 2 SHEETS-SHEET 1.

WITNESSES INVENTOI? JoH/v RHU 5/7 Z2 "Jim 1 ATTORNEY I J. RAU.

GLASS BLANK PRESSING MECHANISM. APPUCATION FILED JAN.30.19\4.

1,1 59,992,. Patented Nov, '9, 191;),

2 sni'irs suin 21 INVENTOR JOHN RA'U, 0F INDIANAPGLIS, INDIANA.

GLASS-BLANK-PBESSING MECHANISM.

Specification of Letters Patent.

Patented Nov. 9, 313E115.

Application filed. January 80. 1914.. Serial No. 815,410.

To all whom it may concern w Be it known that 1, JOHN RAH, a citizen ofthe United States, and a resident of lnrilianapolis, county of Marion,and State of Indiana, have invented a certain new and usefulGlass-Blank; ressing Mechanism and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompan ing drawings, which like letters refer to ikeparts. I The object of this invention is the manufacture of bottles andlike hollow glassware,

particularly those of large capacity, withoutinjuring the mouths andnecks of the bottles and smoothly and perfectly tinis g them.

Heretofore usually the lift over ring only finished the top edge ormouth of the bottle and the. plum er finished the inside of the neckthereof. Any variation of the amount of glass made .a difference in thedistance which the plunge traveled. The end of the plunger slightlychilled the in the neck, but the lower portion of the blank washeaviernnd hotter and upon the removal of the ring and plunger or theblank being transferred to the blow mold from the lift-over, the topedge of the mouth of the bottle would sink and would be drawn by.

suction so as to leave a hole or" recess in the inner surface of theneck just below the mouth which left the neck irregular in f0rming andprovided with projections which would cut the corks. Another difficultyin. the devices in use has been that the glass is liable to adhere tothe ring and plunger and,

during the withdraval the glass is pulled out of shape and to someextent out of the blank mold. One feature of this invention consists inproviding a drop finish. ring so mounted in connection with the plungermounting means that said ring will rest upon the top of the mouth of theblank which has been formed in a mold and linger thereon for a timeafter the plunger has begun to withdraw from the mold or glass blankherein; and after said drop finish ring has performed the function ofholding the mouth of the glass blank down in the mold While thewithdrawal has been started, said ring is lift d by the plunger mountingmechanism from the mouth of, the glass blank and the lift-eversurrounding the neck of the blank. Preferably said ring is held in itslower position by gravity and is connect-- ed with the plunger mountingmeans by headed screws or bolts projecting loosely therethrough and longenough to allow said ring to remain in its down position until after theplunger mechanism has moved upward somewhat during the withdrawal of theplunger. Another feature of the invention consists in combining withsaid drop finish ring, a sleeve connected with the plunger mountingmechanism and adapted to project said ring and serve as mold for formingthe throat of the glass blank, and a plunger movable through said sleeveand independently thereof for entering the glass in the mold and notonly making a blow opening in the blank, but forcing the glass up aroundsaid sleeve and within the lift-over and against said drop finish ringfor forming the neck and mouth of the glass blank. In such constructionthe plungerhas preferably an initial withdrawing movement preceding thewithdrawing movement of the sleeve and the sleeve has a withdrawingmovement preceding' the withdrawal of the dropfinish ring.

The foregoing arrangement and mode of operation thereof preventmalformation of the inner surface, of the neck of the bottle by reasonof the slow withdrawal of said plungel sleeve and prevent the tendencyof the glass in the neck of the bottle to follow said sleeve during itswithdrawal.

1 The full naturepf the invention will be understood from theaccompanying drawings and the following description and claims. 1

In the drawings, Figure l is an elevation initial .witl'idrawal oftheplunger and be fore the plunger sleeve has started to with.- draw, partsbeing broken away. Fig. 3 is a similar section showing the parts withthe :rla'ss in the mold in their condition and positions when the dropfinish ring has started down on the lift-e ror. Fig. 4:

is the same showing the condition of the parts after the plunger hasbeen actuated.

Fig. 5 IS the same showing the parts in pos1- tion after the lun er andlun er sleeve a vertical reciprocatory press rod to which a cross bar orhead 16 is secured. It carries two small rods 17 which are adapted toreciprocate through it and be held from downward escape by the nuts 18on their upper ends. A spring plate 20 the lower end of Said rods 17 andit is pressed downward by spiral springs 21 which surround the rods 17and act between the cross head 16 and the spring plate 20 and yield toupward movement of the spring plate or downward movement of the crosshead. A plate 22 is secured to the underside of the spring plate 20 bybolts or screws 23 or any other means and a plunger sleeve 24 extendsdown from said plate 22 and the plunger 25 is connected with the pressrod 15 and operates through openings in the spring plate 20,

' 24 loosely so that there may be some air fOI'tthe plunger sleeveprojects below leakage between the plunger 25 and said plates. andplunger sleeve. A drop finish rin 30 is secured below and through theplate 22 by headed screws 31 which permit the drop finish ring to dropabout threeeighths of an inch from the plate 22, as shown in nism iswithdrawn from the press mold. The drop finish ring snugly surrounds theup e. part of the plunger sleeve and, thei t e dro finish ring farenough to extend through the neck of the bottle substantially. The glassblank 35 is formed to mold the throat of the glass article and has ashoulder 26 at the upper end which cooperates with a recessed shoulder37 of the surrounding drop finish ring so as to correctlyiform the topof the mouth of the bottle, as'shown in- Fig. 2. The lower portion ofthe drop; finish ring is ring-like and fits in between the mouth of thebottle and the lip 14 and'rests on the liftover. Normally whenthefspri'ngs 21 are extended to their limit permitted by the rods 17,the lower end of the plunger 25 projects to the lower end of thesurrounding plunger sleeve 24, as shown in Fig.1.

The operation is as follows: After the glass has been placed in theblank mold and the lift-over placed thereon and shut and the glass cutoft, the lever of the press, not

at shown, is operated. Ordinarily the glass 35 the plate is secured to.

the plate 22 and the plunger sleeve Fig. 1, when the plunger mechadoesnot fill the lift-over part of the mold, but is substantially as shownin Fig. 3. As 20 descends the loosely suspended drop finish ring 30engages the top of the lift-over and the plunger sleeve 24 enters themold opening through. the lift-over and then plate 22 comes down uponthe drop finish ring 30 and the parts assume the position shown'in Fig.3. In the next step of the operation, the plunger 25 is forced downwardto the position shown in Fig. 4 and forms the blow opening 46 and forcesthe glass up through the moldopening in the lift-over and. around theplunger sleeve 24 and against the drop finish ring, as shown in Fig. 4.When the press lever, not shown, is released, the springs 21 elevate theplunger 25 out of the glass from the position shown in Fig. 4 to theposition shown in Fig. 2. This upward movement of the plunger and plate16 under the influence of the springs 21 kicks up the plates 20 and 22.and the' plunger sleeve 24, thus kicking said plunger sleeve loose fromthe glass, the parts assuming then substantially the position shown inFig. 5, with the withdrawal of the plunger sleeve started and the plate22 elevated somewhat above the drop finish ring 30. Further elevation ofthe plunger mounting means lifts the drop finish ring up from thelift-over, 'as by that time the drop finish ring rests upon. the headsof the screws 31 and further upward movement lifts said rm kicked upto-loosen it from the glass in the lift-over, the drop finish ring stillmaintains its position on top of the glass and prevents the tendency ofthe glass to follow the sleeve.

The function of the plunger sleeve is to' prevent the displacement ofthe glass in the mouth of the bottle which would result if the plunger25 and sleeve were not separate and successively operated. The sleeveprotects the mouth of the bottle while the plunger is being withdrawnand when the sleeve is withdrawn there is no suction to displace theglass and the .drop finish ring holds the glass down at the same time.

The, invention claimed is: 1. Plunger mechanism for forming glass blanksfor bottles including a plunger for forming the blow opening in such ablank,

means for mounting and operating the plunger, a plunger sleevesurrounding the plunger,'yielding means for mounting said sleeve inconnection with the plunger mounting means which permits the plunger tomove downward into the mold farther than the sleeve and after thedownward movement of the sleeve has ceased and to begin itswithdrawal'movement before thewbeginning of the withdrawal'jof thesleeve, a drop finish ring surroundingsaid sleeve, and means for mountng sald ring 1n connection with the sleeve mounting means so that In thedown- 30. When the plun'gersleeve 24 is f place during the beginning ofthe withdrawal of the sleeve.

2. Plunger mechanism for forming glass blanks for bottles including aplunger for forming the blow opening in such a blank, means tor mountingthe plunger, a plunger sleeve surrounding the plunger, means foryieldingly mounting said sleeve in connection with the plunger mountingmeans which permits the plunger to move downward into the mold fartherthan the'sleeve and after the downward movement of the sleeve [hasceased and to begin its Withdrawal movementibefore the beginning of thewithdrawal of the sleeve, a drop finish ring surrounding said sleeve,and headed screws spring plate secured to the lower ends ofi said rods,springs surrounding said rods and pressin against said cross head andplate, a plunger sleeve secured to said plate, a drop finish ringloosely surrounding said plunger, and means for loosely securing saidring to said plate so that the ring will have some inde )endent verticalmovement;

l. Plunger mechanism for forming glass blanks for; bottles includingapress rod and cross head secured thereto, rods vertically movablethrough said cross head with nuts on their upper ends to limit theirdownward movement, a spring plate secured to the lower end of said rods,a spring surrounding said rods and pressing against said plate and crosshead, a plunger sleeve secured to said spring plate, and a plungerextending from said press rod through said spring plate and plungersleeve.

Plunger mechanism for forming glass blanks for bottles including aplunger sleeve, a plunger operating through said plunger sleeve forpressing the blank to form a blow opening therein and force the glass uparound said sleeve, and a drop. finish plate surrounding said plungersleeve and mounted so as to have a limited extent of independentvertical movement.

6.'llunger mechanism for forming glass blanks for bottles including apress rod and cross head secured thereto, rods vertically movablethrough said cross head with nuts on their upper ends to limittheirdownward movement, a spring plate secured to the lower end of said rode,a spring surrounding said rods and pressing against said plate and crosshead,a plunger sleeve secured to said spring plate, a plunger extendingfrom said press rod through said spring plate and sleeve plunger, a dropfinish plate surrounding said sleeve plunger, and means for securing itto said spring plate which permits a limited amount of independentvertical movement of said drop finish ring.

In witness whereof, I have hereunto affixed my signature in the presenceof the witnesses herein named.

JOHN RAU.

.l Vitnesses:

J. H. WELLS, 0-. M. MCLAUGHLIN.

